Build or find a website for testing k6-browser

[yorugac]

Feature Description

We need a website to test k6-browser. It must be complex enough to actually put a strain onto the browser, so grafana/quickpizza is not suitable: it's too simple.

This website must also be observable to us and possible to tweak and configure. So it must either be a website we own / build or a third-party website that can be cloned, deployed and analyzed.

Suggested Solution (optional)

Potential candidates for third-party websites can be looked up here: https://github.com/christianbaumann/personal-knowledge-base/blob/master/links/testautomation.md#practice-sites

Already existing or connected issues / PRs (optional)

This also came up in:

• https://github.com/grafana/k6/issues/4628